X25ALP X25ALP_E03G010 X.25 for OpenVMS Alpha V6.2 ECO Summary
TITLE: X25ALP X25ALP_E03G010 X.25 for OpenVMS Alpha V6.2 ECO Summary
NOTE: An OpenVMS saveset or PCSI installation file is stored
on the Internet in a self-expanding compressed file.
The name of the compressed file will be kit_name-dcx_vaxexe
for OpenVMS VAX or kit_name-dcx_axpexe for OpenVMS Alpha.
Once the file is copied to your system, it can be expanded
by typing RUN compressed_file. The resultant file will
be the OpenVMS saveset or PCSI installation file which
can be used to install the ECO.
Copyright (c) Compaq Computer Corporation 1998. All rights reserved.
PRODUCT: X.25 for OpenVMS Alpha
COMPONENTS: API
DECNet/X.25
Device Drivers
X.25 Management
X.25 Network Layer
OP/SYS: OpenVMS Alpha
SOURCE: Compaq Computer Corporation
ECO INFORMATION:
ECO Kit Name: X25ALP_E03G010
ECO Kits Superseded by This ECO Kit: X25ALP_E02G010
ECO Kit Approximate Size: 11872 Blocks
DEC-AXPVMS-WANDDECO03-V0100-G-1.PCSI 3472 Blocks
DEC-AXPVMS-X25ECO03-V0100-G-1.PCSI 8400 Blocks
Kit Applies To: X.25 for OpenVMS Alpha V1.0G
OpenVMS Alpha V6.2 through V6.2-1H3
System/Cluster Reboot Necessary: Yes
Rolling Re-boot Supported: Not Known
Installation Rating: INSTALL_UNKNOWN
Kit Dependencies:
The following remedial kit(s) must be installed BEFORE
installation of this kit:
None
In order to receive all the corrections listed in this
kit, the following remedial kits should also be installed:
None
ECO KIT SUMMARY:
An ECO kit exists for X.25 V1.0G for OpenVMS Alpha Systems on OpenVMS
Alpha V6.2 through V6.2-1H3. This kit addresses the following problems:
Problems Addressed in X25ALP_E03G010:
Corrections made to X25$ACCESS.EXE:
o IO$_ACCESS and IO$M_REDIRECT adds unwanted facilities data, called
and calling address fields, causing call to clear with bad data.
o For GAP connections posts additional reads when CLR_EXP or data
messages are received to allow subsequent CLR messages to be read.
NSP links remain after application exit. User application was not
receiving all incoming call termination management information so
call could not be considered terminated by the user application.
o OSI Transport initiates data transmission after X.25 call clearing
has been initiated.
o Stale connection-id in VCRP causes panic, trying to free memory a
second time.
o The root of the problem was that a double deallocation of memory was
occurring when facilities data was included for clearing connections
which use the X25$ACCESS port to OSI Transport. The problems
appeared during both the CLEAR and CLRC operations. There are
additional symptoms, causing errors as a result of:
- timer queue entries becoming corrupted,
- VCRP double deallocation when pool checking was enabled, or
- clear or clear confirm messages with facilities data from
Routeabout Routers.
Corrections made to X25$ZSDRIVER.EXE:
o Crash in ZSDRIVER when line not in use, apparently from sufficient
noise on the line to cause a data overrun.
Corrections made to X25$ACCESS.EXE and X25$ZWDRIVER.EXE:
o Sufficient amounts of data of a "fast" system, such as an
AlphaServer 4100, caused data transmission to cease. The ZWDRIVER
was needlessly consuming large amounts CPU time on AlphaServer 4000
family systems. For PBXDP cards with greater than 2 ports, the
modem control signals for each of ports 0, 2, 4 and 6, was based
solely on the state of port 0, and likewise, the modem control
signals for ports 1, 3, 5 and 7 was base on port 1. The modem
control signal DTR state was being destroyed after reading from the
register on the PBXDP that controls DTR.
Corrections made to X25$ZSDRIVER.EXE and X25$ZWDRIVER.EXE:
o When using internal clocking, attempts to set the clock speed too
high can cause a system crash with arithmetic exception - integer
divide by 0. The driver assumed a transmit underrun could only
happen while it still had a transmit frame in progress and it would
panic.
Corrections made to X25$MEL.EXE:
o "NCL SHOW X25 PROTOCOL DTE" counters are negative or incorrect when
used in conjunction with the SNAP command modifier.
Corrections made to X25$L2.EXE:
o When connected to a RouteAbout, X.25 thought the RouteAbout had a
receive window of 0 and consequently could not receive frames.
Therefore, X,25 would not send any response to the X.25 RESTART
packet from the RouteAbout.
o A panic occurred during X25 shutdown when LLC2 is used over FDDI,
due to the premature deallocation of the VCIB used for communication
between LLC2 and the FDDI driver.
o Under certain circumstances, the response to an RR was lost from the
remote system, and the software would send out two I frames of data
with the same sequence number, followed by a rejection of the RR
after the lost RR message.
Corrections made to X25$KERNEL_RTL.EXE:
o The "NCL NODE SHOW LINK" failed on
remote node.
Corrections made to X25$ACCESS.EXE and X25$NWDRIVER.EXE:
o The problem occurred when a DTE on a gateway port was dropped and an
Alpha application using PVC did not get notified of the restart from
the gateway. An insufficient number of reads were being issued to
process the network management commands (NOCOMM, RESET, RESTART)
along with the incoming data frames.
Problems Addressed in X25ALP_E02G010:
o Stop ZWDRIVER needlessly consuming large amounts CPU time on
AlphaServer 4000 family systems.
o On PBXDP boards with more than 2 ports, correctly report the state
of the modem control signals of ports above the first two. (The
previous driver incorrectly reported the state of modem control
signals for port 0 as the state of the modem control signals for
each of ports 0, 2, 4 and 6 AND reported the state of the modem
control signals for port 1 as the state of the modem control signals
for ports 1, 3, 5 and 7.)
o Ensure the state of the modem control signal DTR always is preserved
across modifications to the register which controls DTR. Previously
the board read the port register and inadvertently changed bit
settings when doing so. The change corrects this situation for all
ports on the PBXDP synchronous communications card.
INSTALLATION NOTES:
The images in this kit will not take effect until the system is rebooted.
If there are other nodes in the VMScluster, they must also be rebooted
in order to make use of the new image(s).
This patch can be found at any of these sites:
Colorado Site
Georgia Site
Files on this server are as follows:
dec-axpvms-wanddeco03-v0100-g-1.README
dec-axpvms-wanddeco03-v0100-g-1.CHKSUM
dec-axpvms-wanddeco03-v0100-g-1.pcsi-dcx_axpexe
dec-axpvms-x25eco03-v0100-g-1.pcsi-dcx_axpexe
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